A virtual cannot be caought on a screen,...

A virtual cannot be caought on a screen, Yet when we see a virtual image, we bring it to the screen i.e., retina of our eye. This happnes because

we have two eyes

eye lens is convergent

eye lens is divergent

image or retina is in the from of electrical neural pulse.

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When would virtual image be produced by convex lens? Why can virtual image be not obtained on a screen?

Answer the following questions: A virtual image cannot be obtained or projected on a screen. Why?

Select the appropriate option and complete the following paragraph. (cornea, faint, conical, rod, image, coloured, retina, colours, myopic, presbyopic, colour blind) The ____ in our eyes consists of many light sensitive cells. These cells are shaped like a rod and like a cone. The ____ shaped cells give information about the intensity of light to the brain. The ____ cells give information about the colour of the object to the brain. Brain processes all the information received and we see the actual image of the object. Rod shaped cells respond to ___ light also but conical cells do not. Thus we perceive ____ only in bright light. Some people cannot recognize few colours or cannot distinguish between different colours. These persons are said to be _____. Apart from not being able to distinguish between different colours, their eye sight is normal.

Choose the correct alternative and write it along with its allotted alphabet: A ...... Image cannot be obtained on a screen. A. virtual B. real C. magnified D. inverted

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